Флажок 'unchecked' обработчик событий

Question

У меня есть recyclerview с checkbox, который будет добавлять элемент к Arraylist каждый раз, когда проверяется checkbox.Но я хочу, чтобы они удалили элемент, когда checkbox снят

public class AttendeesRecAdapter extends RecyclerView.Adapter<AttendeesRecAdapter.ViewHolder>{
    private Context context;
    private AttendeesListener attendeesListener;
    private ArrayList<AttendeesDUmmy> dumme;
ArrayList<AttendDummyAgain> list = new ArrayList<>();

    public AttendeesRecAdapter(ArrayList<AttendeesDUmmy> dumme,Context context,AttendeesListener attendeesListener) {
        this.context = context;
        this.dumme = dumme;
        this.attendeesListener = attendeesListener;
    }

    public interface AttendeesListener{
        void onClickAtLayout(AttendeesDUmmy attt);
    }

    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View v = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.attendees_card,parent,false);

        return new ViewHolder(v);
    }

    @Override
    public void onBindViewHolder(AttendeesRecAdapter.ViewHolder holder, int position) {

        AttendeesDUmmy att = dumme.get(position);
        holder.txName.setText(att.getName());
        holder.txtNRIC.setText(att.getNRIC());
        holder.txtPassport.setText(att.getPassport());
        holder.txtmV.setText(att.getWp());

        holder.cardItemRoot.setOnClickListener(v -> attendeesListener.onClickAtLayout(att));
        holder.checkBox.setOnCheckedChangeListener((buttonView, isChecked) -> {


            if (isChecked){
                list.add(new AttendDummyAgain(att.getName(),att.getWp()));
                Logger.d(" Attende Dummy" +list);
                notifyDataSetChanged();
            }else {

                Logger.d(" Attende Dummy" +list);
                if (list.size() != 0){
                    list.remove(position);
                    notifyItemRemoved(position);
                    Logger.d(" Attende Dummy" +list);
                }


            }
        });

    }

    @Override
    public int getItemCount() {
        if (dumme != null){
            return dumme.size();
        }else {
            return 0;
        }
    }

    public class ViewHolder extends RecyclerView.ViewHolder{

        TextView txName;
        TextView txtmV;
        TextView txtPassport;
        TextView txtNRIC;
        CardView cardItemRoot;
        CheckBox checkBox;

        public ViewHolder(View itemView) {
            super(itemView);
            txName = itemView.findViewById(R.id.attendees_name);
            txtNRIC = itemView.findViewById(R.id.attendees_NRIC);
            txtPassport = itemView.findViewById(R.id.attendees_passport);
            txtmV = itemView.findViewById(R.id.attendees_wp);
            cardItemRoot = itemView.findViewById(R.id.attendees_card_item_root);
            checkBox = itemView.findViewById(R.id.attendees_checkboxes);
        }
    }
}